
A-78640E
Sheet
Title
Draw
No.
04 Feb.08.’03 Part of (4) is added or modified. Addition of 2.16.5
03 Jul.02.’02 A. Fukumoto Part of (3) is added or modified. T.Endo
02 May.13.’02 A. Fukumoto Addition of Tool Radius control for 5-axis machining etc T.Endo
Ed. Date Design Description
Date Jan.25.’02 Desig. A.Fukumoto Apprv. T.Endo
FANUC Series 16i /18i -TB
Specifications of AI High-Precision Contour Control /
I Nano High-Precision Contour control
185/190
Example 2 ) When the under-mentioned program is executed, the starting point of N5
is decided by the vector made with N3 and N4.
6.4 Acceleration/Deceleration before Interpolation in Look-ahead Blocks
• Short blocks
If there is a series of very short blocks, for each of which the rate of
acceleration/deceleration before interpolation is low, the actual feedrate may not
reach the programmed feedrate.
• Slow down
If the permissible acceleration set for one axis is two or more times greater than
that set for another, the feedrate may decrease temporarily at those corners
where the travel direction changes abruptly.
• Machine lock
If the machine lock signal is turned on during travel in look-ahead
acceleration/deceleration before interpolation mode, the machine enters the
machine lock state after the end of deceleration.
• Command by which deceleration stop is done
If there is a block with no travel or a one-shot G code command such as G04 in
look-ahead acceleration/deceleration before interpolation mode, deceleration is
performed for a stop in the preceding block.
• Dry run
If the dry run signal changes from "0" to "1" or from "1" to "0" during travel on an
axis, acceleration/deceleration is performed to achieve the prescribed feedrate
without deceleration to feedrate 0.
The function for deceleration with the feedrate difference at a corner is effective
even during dry run.
N1 N2 N5
N3 N4
N6
N7
This vector is used as the vector
between N4 and N5, and N5 and N6.
Programmed path
Tool path
n incorrect offset
value is used in this
area.
O0001 ;
G50 X-10. Y-20. ;
G05 P10000 ;
N1 G01 G42 X0 D1 F1000 ;
N2 X20. ;
N3 X40. Y0 ;
N4 X60. Y20. ;
N5 M50 X80. ;
N6 X90. Y-20. ;
N7 G40 Y-50. ;
G05 P0 ;